# What's the difference between these two Venn diagrams?

If I want to describe these two representations, what should I say about the first and what about the second one?

My idea is that the first a three separate sets and the third one is the union, is it right?

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I don't understand what your diagrams mean. What's a "representation" ? What does it mean when you put a letter inside a circle? What does it mean when you put a letter outside a circle? – Ted Sep 4 '11 at 22:17
You seem to be using the letters $A$, $B$, $C$, etc. for several different things at once! Do you mean that you have 5 sets, $A$, $B$, $C$, $D$, $E$, that $A$ contains elements $b,c,d$; $B$ contains elements $a,d,e$, etc., and you are trying to make a Venn diagram of this? Of something else? – Arturo Magidin Sep 4 '11 at 22:29
I think @Arturo has the right idea. If the letters in the first diagram were relabelled $A',B',C'$, etc. then they would be five subsets of $\{A,B,C,D,E\}$, and the picture on the right is sort of a spatial depiction of how these sets overlap. OP asking us what he "should" say about them is a vague question still. – anon Sep 5 '11 at 0:16